package main

import "fmt"

func main() {
	var s []int
	s = append(s, 1)
	s = append(s, 2, 3, 4)
	s2 := []int{5, 6, 7}
	s = append(s, s2...)
	fmt.Println(s) // [1 2 3 4 5 6 7]
}
